data.table v1.5.1
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by M Dowle
Extension of data.frame for fast subset, fast merge and fast grouping.
Enhanced data.frame. Fast subset, grouping and merge in a
short and flexible syntax. i and j may be expressions of column
names directly, for faster development. Example: X[Y] is a
fast join for large data.
Functions in data.table
| Name | Description | |
| duplicated | Determine Duplicate Rows | |
| Extract.data.table | Query a data table | |
| merge | Merge Two Data Tables | |
| between | Convenience function for range subset logic. | |
| J | Creates a Join data table | |
| like | Convenience function for calling regexpr. | |
| data.table | Enhanced data.frame | |
| transform.data.table | Data table utilities | |
| IDateTime | Integer based date class | |
| test.data.table | Runs a set of tests. | |
| timetaken | Pretty print of time taken | |
| tables | Display all objects of class 'data.table' | |
| setkey | Create key on a data table | |
| last | Last item of an object | |
| No Results! | ||
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Details
| License | GPL |
| URL | http://datatable.r-forge.r-project.org/ |
| Packaged | 2011-01-07 01:07:22 UTC; mdowle |
| Repository | CRAN |
| Date/Publication | 2011-01-08 08:31:24 |
| depends | base (>= 2.10.0) , R (>= 2.10.0) |
| suggests | chron , ggplot2 |
| Contributors | Matthew Dowle |
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